mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
71c1646ba3
Use Resources to represent container limits rather than a cgroup specific field. Docker-DCO-1.1-Signed-off-by: Paul Nasrat <pnasrat@gmail.com> (github: pnasrat)
141 lines
3.5 KiB
Go
141 lines
3.5 KiB
Go
package lxc
|
|
|
|
import (
|
|
"github.com/dotcloud/docker/execdriver"
|
|
"strings"
|
|
"text/template"
|
|
)
|
|
|
|
const LxcTemplate = `
|
|
{{if .Network}}
|
|
# network configuration
|
|
lxc.network.type = veth
|
|
lxc.network.link = {{.Network.Bridge}}
|
|
lxc.network.name = eth0
|
|
{{else}}
|
|
# network is disabled (-n=false)
|
|
lxc.network.type = empty
|
|
{{end}}
|
|
|
|
# root filesystem
|
|
{{$ROOTFS := .Rootfs}}
|
|
lxc.rootfs = {{$ROOTFS}}
|
|
|
|
# use a dedicated pts for the container (and limit the number of pseudo terminal
|
|
# available)
|
|
lxc.pts = 1024
|
|
|
|
# disable the main console
|
|
lxc.console = none
|
|
|
|
# no controlling tty at all
|
|
lxc.tty = 1
|
|
|
|
{{if .Privileged}}
|
|
lxc.cgroup.devices.allow = a
|
|
{{else}}
|
|
# no implicit access to devices
|
|
lxc.cgroup.devices.deny = a
|
|
|
|
# /dev/null and zero
|
|
lxc.cgroup.devices.allow = c 1:3 rwm
|
|
lxc.cgroup.devices.allow = c 1:5 rwm
|
|
|
|
# consoles
|
|
lxc.cgroup.devices.allow = c 5:1 rwm
|
|
lxc.cgroup.devices.allow = c 5:0 rwm
|
|
lxc.cgroup.devices.allow = c 4:0 rwm
|
|
lxc.cgroup.devices.allow = c 4:1 rwm
|
|
|
|
# /dev/urandom,/dev/random
|
|
lxc.cgroup.devices.allow = c 1:9 rwm
|
|
lxc.cgroup.devices.allow = c 1:8 rwm
|
|
|
|
# /dev/pts/ - pts namespaces are "coming soon"
|
|
lxc.cgroup.devices.allow = c 136:* rwm
|
|
lxc.cgroup.devices.allow = c 5:2 rwm
|
|
|
|
# tuntap
|
|
lxc.cgroup.devices.allow = c 10:200 rwm
|
|
|
|
# fuse
|
|
#lxc.cgroup.devices.allow = c 10:229 rwm
|
|
|
|
# rtc
|
|
#lxc.cgroup.devices.allow = c 254:0 rwm
|
|
{{end}}
|
|
|
|
# standard mount point
|
|
# Use mnt.putold as per https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/986385
|
|
lxc.pivotdir = lxc_putold
|
|
|
|
# NOTICE: These mounts must be applied within the namespace
|
|
|
|
# WARNING: procfs is a known attack vector and should probably be disabled
|
|
# if your userspace allows it. eg. see http://blog.zx2c4.com/749
|
|
lxc.mount.entry = proc {{escapeFstabSpaces $ROOTFS}}/proc proc nosuid,nodev,noexec 0 0
|
|
|
|
# WARNING: sysfs is a known attack vector and should probably be disabled
|
|
# if your userspace allows it. eg. see http://bit.ly/T9CkqJ
|
|
lxc.mount.entry = sysfs {{escapeFstabSpaces $ROOTFS}}/sys sysfs nosuid,nodev,noexec 0 0
|
|
|
|
lxc.mount.entry = devpts {{escapeFstabSpaces $ROOTFS}}/dev/pts devpts newinstance,ptmxmode=0666,nosuid,noexec 0 0
|
|
lxc.mount.entry = shm {{escapeFstabSpaces $ROOTFS}}/dev/shm tmpfs size=65536k,nosuid,nodev,noexec 0 0
|
|
|
|
{{if .Privileged}}
|
|
{{if .AppArmor}}
|
|
lxc.aa_profile = unconfined
|
|
{{else}}
|
|
#lxc.aa_profile = unconfined
|
|
{{end}}
|
|
{{end}}
|
|
|
|
# limits
|
|
{{if .Resources}}
|
|
{{if .Resources.Memory}}
|
|
lxc.cgroup.memory.limit_in_bytes = {{.Resources.Memory}}
|
|
lxc.cgroup.memory.soft_limit_in_bytes = {{.Resources.Memory}}
|
|
{{with $memSwap := getMemorySwap .Resources}}
|
|
lxc.cgroup.memory.memsw.limit_in_bytes = {{$memSwap}}
|
|
{{end}}
|
|
{{end}}
|
|
{{if .Resources.CpuShares}}
|
|
lxc.cgroup.cpu.shares = {{.Resources.CpuShares}}
|
|
{{end}}
|
|
{{end}}
|
|
|
|
{{if .Config}}
|
|
{{range $value := .Config}}
|
|
{{$value}}
|
|
{{end}}
|
|
{{end}}
|
|
`
|
|
|
|
var LxcTemplateCompiled *template.Template
|
|
|
|
// Escape spaces in strings according to the fstab documentation, which is the
|
|
// format for "lxc.mount.entry" lines in lxc.conf. See also "man 5 fstab".
|
|
func escapeFstabSpaces(field string) string {
|
|
return strings.Replace(field, " ", "\\040", -1)
|
|
}
|
|
|
|
func getMemorySwap(v *execdriver.Resources) int64 {
|
|
// By default, MemorySwap is set to twice the size of RAM.
|
|
// If you want to omit MemorySwap, set it to `-1'.
|
|
if v.MemorySwap < 0 {
|
|
return 0
|
|
}
|
|
return v.Memory * 2
|
|
}
|
|
|
|
func init() {
|
|
var err error
|
|
funcMap := template.FuncMap{
|
|
"getMemorySwap": getMemorySwap,
|
|
"escapeFstabSpaces": escapeFstabSpaces,
|
|
}
|
|
LxcTemplateCompiled, err = template.New("lxc").Funcs(funcMap).Parse(LxcTemplate)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|